Karpova: This game was played in the German Chess Club Vienna. Grünfeld annotated the game (I only give some excerpts).
3.g3<!> Grünfeld considers his continuation to be the best answer, retaining White's opening advantage. By developing the ♔'s wing like this, White prevents the exchange of dark-squared ♗s (<3.c4 Nf6 4.Nc3 Bb4>), so that the ♗f8 has to be developed to either g7 or e7. The ♘c3, on the other hand, will have a strong grip on the centre, in connection with the ♗g2 (<.d5!>). This is the Dutch <Achilles' heel>.
6...0-0: Grünfeld cites an earlier game <6...d6 7.Nc3 Nc6 8.d5 exd5 9.cxd5 Ne5 10.Nd4> (Grünfeld-Tartakower, Vierkampf, Vienna, 1920. <D. S. 1920> (Deutsche Schachzeitung perhaps)).
Instead of 7.Nc3, Grünfeld suggests <7.d5!> to prevent <...d5> and cramp Black's position.
10.Qa3 parries <...g5>.
21.Rfe1<!> prevents <...g5>.
22...Kh6 was played with regards to <.Nxd5> followed by <.Rc7>.
Source: 'Österreichische Schachrundschau', July 1922, issue 5, pp. 37-38